-96.62% is the change from 828 to 28
Calculation steps:
[( 28 - 828 ) ÷ 828] x 100 = -96.62%
Formula
Percentage change = [(28 - 828) / 828] x 100
Subtract the new number by the original number
28 - 828 = -800
-800 ÷ 828 = -0.966183574879227
-0.966183574879227 x 100 = -96.62%